<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <input type="text" v-model="n1">
    <input type="text" v-model="n2">
    <input type="button" value="加" @click="f('+')">
    <input type="button" value="减" @click="f('-')">
    <input type="button" value="乘" @click="f('*')">
    <input type="button" value="除" @click="f('/')">
    <h1>
        结果:{{result}}
    </h1>
</div>
    <script src="../js/vue.js"></script>
    <script>
        let v = new Vue({
            el: "div",
            data: {
                n1:"",
                n2:"",
                result:"0"
            },
            methods:{
                f(x){
                    //eval()方法可以将字符串以代码的形式执行
                    v.result = eval(v.n1+x+v.n2);
                    eval("1+2");
                }
            }
        })
    </script>
</body>
</html>